Just a suggestion, considering your "example: iPhone" in the title. You may want to search the ios tag in stead, since the iphone tag is intended specifically for questions relating to iphone hardware (although it's used incorrectly all the time). The ios tag is for iPod Touch, iPhone, iPad and Apple TV software. The objective-c tag should be useful as well.
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AberrantNov 3 '11 at 12:53